Do not warn -Wsuggest-attribute=noreturn for main.chkp (PR middle-end/78339).

2017-03-13  Martin Liska  <mliska@suse.cz>

	PR middle-end/78339
	* ipa-pure-const.c (warn_function_noreturn): If the declarations
	is a CHKP clone, use original declaration.
2017-03-13  Martin Liska  <mliska@suse.cz>

	PR middle-end/78339
	* gcc.target/i386/mpx/pr78339.c: New test.

From-SVN: r246098

gcc/ChangeLog

+2017-03-13  Martin Liska  <mliska@suse.cz>
+
+	PR middle-end/78339
+	* ipa-pure-const.c (warn_function_noreturn): If the declarations
+	is a CHKP clone, use original declaration.
+
 2017-03-13  Claudiu Zissulescu  <claziss@synopsys.com>
 
 	* config/arc/arc.c (arc_init): Use multiplier whenever we have it.

gcc/ipa-pure-const.c

@@ -218,11 +218,17 @@ warn_function_const (tree decl, bool known_finite)
 static void
 warn_function_noreturn (tree decl)
 {
+  tree original_decl = decl;
+
+  cgraph_node *node = cgraph_node::get (decl);
+  if (node->instrumentation_clone)
+    decl = node->instrumented_version->decl;
+
   static hash_set<tree> *warned_about;
   if (!lang_hooks.missing_noreturn_ok_p (decl)
       && targetm.warn_func_return (decl))
     warned_about 
-      = suggest_attribute (OPT_Wsuggest_attribute_noreturn, decl,
+      = suggest_attribute (OPT_Wsuggest_attribute_noreturn, original_decl,
 			   true, warned_about, "noreturn");
 }
 

gcc/testsuite/ChangeLog

+2017-03-13  Martin Liska  <mliska@suse.cz>
+
+	PR middle-end/78339
+	* gcc.target/i386/mpx/pr78339.c: New test.
+
 2017-03-13  Claudiu Zissulescu  <claziss@synopsys.com>
 
 	* testsuite/gcc.target/arc/bitfield.c: New file.

gcc/testsuite/gcc.target/i386/mpx/pr78339.c

+/* { dg-do compile } */
+/* { dg-options "-fcheck-pointer-bounds -mmpx -Wsuggest-attribute=noreturn" } */
+
+extern _Noreturn void exit (int);
+int main (void) { exit (1); }